Light-emitting element lamp and lighting equipment

Abstract

The present invention provides a light-emitting element lamp 1 capable of preventing a temperature rise of a substrate 9 , on which light-emitting elements 4 are mounted, by effectively utilizing a thermally conductive casing 2 and a thermally conductive cover 5. The light emitting element lamp 1 includes a thermally conductive casing 2 , a light source part 3 , a thermally conductive cover 5 , and an insulative cover 6 . The thermally conductive casing 2 includes an irradiation opening 2 b , is formed so as to be widened toward the irradiation opening 2 b , has its outer circumferential surface exposed outwardly, and has a substrate mounting part 2 c secured on its inner circumferential surface. The light source part 3 has a substrate 9 having the light-emitting elements 4 mounted thereon and causes the substrate 9 to be thermally coupled to and attached to the substrate mounting part 2 c of the thermally conductive casing 2 . The thermally conductive cover 5 is thermally coupled to and connected to the outer circumferential surface of the thermally conductive casing 2 in a surface-contacted state. The insulative cover 6 has one end side thereof connected to the thermally conductive cover 5 , and the cap 7 is connected to the other end side thereof. The lighting circuit 12 controls lighting of the light-emitting elements 4 accommodated in the insulative cover 6.

1. A light-emitting element lamp including:
 a thermally conductive substrate mounting part comprising a screw through-hole and an outer circumferential surface exposed outwardly; 
 a light source part comprising a substrate with light-emitting elements mounted thereon, the substrate being attached to the substrate mounting part so as to be thermally coupled to the substrate mounting part; 
 a thermally conductive cover comprising a first end with an annular connection part and a second end, the annular connection part being thermally coupled to and connected to the substrate mounting part, wherein a screw hole is disposed in the cover at a position opposing the screw through-hole of substrate mounting part, the cover is tapered radially inward from the first end to the second end, and a width of an inner space defined by an inside of the cover decreases from a portion of the inner space near the first end to a portion of the inner space near the second end; 
 an insulative cover comprising a first end and a second end, wherein the first end is connected to the thermally conductive cover and the second end comprises a cap connected thereto; 
 a lighting circuit which is accommodated in the insulative cover and is configured to control lighting of the light-emitting elements; and 
 a screw which is screwed in the screw hole of the thermally conductive cover via the screw through-hole of the substrate mounting part, the screw pressing and fixing the substrate mounting part against the connection part of the thermally conductive cover. 
 
     
     
       2. The light-emitting element lamp according to  claim 1 , wherein an annular groove is formed in the connection part of the thermally conductive cover, an O-ring is fitted in the groove, and the O-ring is pressed against the substrate mounting part and resiliently deformed. 
     
     
       3. Lighting equipment including:
 an equipment main body comprising a socket; 
 a light-emitting element lamp according to  claim 1 , which is mounted in the socket of the equipment main body. 
 
     
     
       4. Lighting equipment including:
 an equipment main body comprising a socket; 
 a light-emitting element lamp according to  claim 2 , which is mounted in the socket of the equipment main body, 
 
     
     
       5. The light-emitting element lamp according to  claim 1 , wherein the screw presses and fixes the light source part against the connection part of the thermally conductive cover together with the substrate mounting part.